JPH0744672Y2 - Mobile work platform with foldable handrail frame - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The idea of this application is to work scaffolds used at construction sites, especially,
The present invention relates to a mobile work scaffold having a foldable handrail frame.

[Prior art]

In a mobile work scaffold used at a construction site or the like, a handrail frame that can be folded has been proposed (for example, Japanese Utility Model Laid-Open No. 63-125048). The above proposed mobile work platform 1 is shown in FIGS. 7 to 9, in which the pedestal 3 is supported by casters, wheels 2, etc.,
Further, the work floor 4 is fixed to the upper end of the pedestal 3, the lower end 5a of the handrail post 5 is rotatably connected to the upper end 3a of the pedestal 3 by a shaft 6, and the sheath pipe 7 slides on the handrail post 5. The handrail pillars 5 are freely fitted and connected to each other by the handrail rods 8 and 8a. As shown in FIG. 9, the groove 7a of the sheath tube 7 is engaged with the pin 5b provided on the handrail pillar 5. Then, the sheath pipe 7 is held by the handrail post 5, and the handrail post 5 is tilted or raised, and the handrail post 5 is raised to raise the pedestal 3
The sheath tube 7 is positioned on the connecting portions 3a, 5a, 6 between the handrail pillar 5 and the handrail pillar 5 so that the handrail pillar 5 is maintained in the standing posture. Further, a work scaffolding device for a crane jib, in which the handrail support post is foldable, is proposed (for example,
No. 62-8290). The above proposed work scaffolding device is mounted on the side surface of the scaffolding plate with a tubular bracket oriented in the vertical direction, and the lower part of the handrail pillar is slidably fitted in the tubular bracket in the vertical direction,
A protrusion that engages with a vertically elongated hole provided on the bracket is provided on the lower portion of the handrail support column, and a notch portion that allows the handrail support column to rotate about the protrusion is provided on the upper portion of the bracket. A butterfly bolt for fixing the fitting position of the railing strut is provided on the bracket, and the lower end of the handrail strut is pushed to the lower part of the tubular bracket to maintain the handrail strut in an upright posture. , And pull up the lower end of the handrail prop to the upper part of the tubular bracket, fold down the handrail prop to make it a substantially horizontal folded state, and fix the folded state of the handrail prop with the fixing member provided on the scaffold plate. It is designed to be fixed.

[Problems to be Solved by the Invention] In the proposed movable work scaffold 1, when the handrail frame is folded, the connecting portions 3a, 5a, 6 of the pedestal 3 and the handrail 5 are connected.
After moving the upper sheath tube 7 upward and locking the groove 7a of the sheath tube 7 with the pin 5b, it is necessary to tilt the handrail frame. After raising it, it is necessary to remove the groove 7a of the sheath tube 7 from the pin 7b and move the sheath tube 7 on the connecting portions 3a, 5a, 6 of the pedestal 3 and the handrail column 6 to raise and lower the handrail frame. There is a drawback that folding operation is troublesome. In addition, in the already proposed work scaffolding equipment for crane jib, the upright posture of the handrail prop is fixed with butterfly bolts,
Since it is necessary to fix the folded state of the handrail support by a fixing member provided on the scaffolding plate, there is a drawback that it takes a lot of time and effort to stand up and fold the handrail support. The problem to be solved by the invention of the application is to provide a movable work scaffold provided with a foldable handrail frame which does not have the above-mentioned drawbacks of the prior art, in other words, only by operating the handrail rod. It is an object of the present invention to provide a movable work scaffold provided with a foldable handrail frame that can stand and fold.

[Means for Solving the Problems]

This invention adopts the following configuration as a means for solving the above problems. The construction of this invention is a mobile work scaffold in which the work floor is attached to the scaffold frame, the handrail post of the handrail frame is attached above the pedestal of the scaffold frame, and the handrail frame is foldable. , The lower part of the handrail post is attached to the upper part of the pedestal so that the lower part of the handrail post can be moved up and down, and the spring for urging the handrail post downward is provided. Is configured to be engaged with the train wheel upper member to maintain the standing posture, and when the lower part of the handrail pillar is in the upper position, the lower part of the handrail pillar is disengaged from the train wheel member so that the handrail pillar can be erected. It is on a mobile work scaffold that is characterized by The column bases and handrail columns of the work scaffold are usually made of pipes,
You may comprise with a solid rod-shaped body. The upper part of the pedestal may be used as a mounting part of the handrail post, or the upper part of the pedestal may be configured by a connecting body which is detachably connected to the upper part of the pedestal, and the connecting body may be used as an external part of the handrail post. To attach the lower part of the handrail pillar to the upper part of the pedestal so that it can move between the lower position and the upper position, for example, a vertical groove provided in the lower part of the handrail pillar with a pivot provided on the upper part of the pedestal pillar. Or a pivot (projection shaft) provided on the handrail post is fitted into a vertical long groove provided on the upper part of the pedestal. The spring for maintaining the handrail post at its lower position may be provided anywhere, but if the handrail post is made of a tubular body and the spring is provided inside the handrail post, the spring will interfere with the work. There is no. In order to maintain the upright posture of the handrail pillar at the lower position of the handrail pillar, for example, the lower part of the handrail pillar is engaged with a regulation member (for example, a connecting pipe) provided on the upper portion of the pedestal pillar. In order to allow the handrail post to be raised and lowered at its upper position, for example, a notch is provided in the upper part of the pedestal, or a projection provided on the upper part of the pedestal is used as the attachment part of the pivot. In a preferred embodiment, the connecting pipe is removably attached to the upper part of the pedestal of the scaffolding frame, a vertical groove is provided in the handrail column of the pipe body, and a notch and a pivot are provided on the upper part of the connecting pipe. , So that the pivot shaft is fitted in the long groove so that the lower part of the handrail column of the pipe can be fitted to the connecting pipe, and a locking pin is provided above the long groove of the handrail column of the pipe. A spring for urging the handrail pillar downward is inserted between the pivot shaft and the lower end of the handrail pillar when the pivot axis of the connecting pipe is engaged with the upper end of the long groove of the handrail pillar. It is located in the lower part of the handrail post so that the handrail post maintains its upright posture, and when the lower end of the long groove of the handrail post is engaged with the pivot of the connecting pipe, the lower end of the handrail post is Be positioned in the notch so that the handrail post can be brought down to the notched side of the connecting pipe. By connecting the connecting pipe to the upper part of the pedestal of the scaffolding frame so that the scaffolding frame can be detached, even if the scaffolding frame is composed of an existing portal frame, the foldable handrail frame can be easily attached to the scaffolding frame. it can. The notch of the pedestal (or connecting pipe) of the pipe body is formed in the upper part of the pedestal in one direction perpendicular to the axis of the pivot when tilting the handrail column in one direction, and the handrail post is When tilted in two directions, they are respectively formed on the upper part of the pedestal in two directions perpendicular to the axis of the pivot. The notch has a width equal to or larger than the diameter of the handrail pillar. Further, if the lower end portion of the handrail post is formed into a spherical surface, the handrail post will easily fall and fall.

[Action]

The movable work scaffold of the present invention is attached to the upper part of the pedestal so that the lower part of the handrail post can be moved in the vertical direction, is provided with a spring for urging the handrail post downward, and the lower part of the handrail post is in the lower position. Sometimes the lower part of the handrail pillar engages with the train member on the upper part of the pedestal to maintain the standing posture, and when the lower part of the handrail pillar is in the upper position, the lower part of the handrail pillar disengages from the train wheel member and the handrail pillar becomes Since it is configured so that it can be erected, when the handrail rod of the handrail frame is held and the handrail column is moved upward against the spring, the handrail column can be erected. When the handrail rod is pushed laterally in, the handrail post of the handrail frame can be easily folded and folded. To erect the handrail frame from the folded state, hold the handrail rod of the handrail frame in the folded state and push the handrail rod in the lateral direction opposite to the lateral direction to erect the handrail frame. The lower portion of the handrail moves downward and engages with the regulating member, and the upright posture of the handrail frame is maintained.

【Example】

The first embodiment of the present invention is shown in FIGS. 1 to 5 and is an example in which the handrail frame is tilted in one direction to be folded. The work scaffold 10 includes a scaffold frame 11, a work floor 12, and a connecting pipe 13
And the handrail frame 14. The scaffolding frame body 11 is formed by connecting a pair of portal frames 11A and 11B with bracing rods 11C. Gate frame 1
Each of 1A and 11B is composed of an existing portal frame formed by connecting two pedestals 11a made of a tubular body with a horizontal rod 11b made of a tubular body or the like. The working floor 12 is constructed by locking pieces 12b provided at both ends of a floor plate 12a on the horizontal rods 11b of each gate frame. The handrail frame body 14 is composed of four handrail pillars 14A and handrail rods 14B and 14C. The connecting pipe 13 is composed of a short tube body, and the tenon pipe 13b is fitted and fixed to the lower end 13a of the connecting pipe 13, and the handrail post is provided above the connecting pipe 13 at 13c.
A notch 13b is formed to allow rotation of 14A. In addition, a through hole 13b ₁ for passing the stopper pin 18 is opened in the mortise tube 13b, and the connecting tube 13b
A through hole (13e) for inserting a pivot (17) pivotally supporting the handrail post (14A) is formed in the upper part of the. The handrail post 14A is composed of a tubular body, and a vertical long groove 14A1 for guiding the pivot 17 is provided in the lower portion thereof. A through hole 14A2 through which a locking pin 16 for locking the upper end 15a of the coil spring 15 is inserted is formed in the tubular body 14A above the long groove 14A1. The coil spring 15 is inserted into the handrail post 14A, and the upper end 15a of the coil spring 15 is attached to the locking ring portion 15a ₁ at the handrail post 14A.
The upper end 15a of the coil spring 15 is locked to the handrail post 14A by passing the locking pin 16 through the through hole 14A2. Extending the coil spring 15 to pull the lower end 15b of the coil spring 15, through the sleeve 17a through the elongated groove 14A1 to the engaging ring portion 15a ₁ of the lower end 15b of the coil spring 15, the upper end of the sleeve 17a of the long groove 14A1 Lock with 14A1a. Handrail pillar
A lid 14A4 having a hemispherical surface 14B4a is fitted to the lower end 14A3 of 14A, and the lid 14A4 is fixed to the handrail post 14A by an appropriate means. Fit the lower part of the handrail post 14A on the upper part of the connecting pipe 13
The pivot 17 is passed through the through hole 13e and the hole of the sleeve 17, and the handrail post 14A is attached to the connecting pipe 13 by the pivot 17 along the long groove 14A1 so as to be movable. The connecting body 14A5 is fixed to the handrail pillar 14A and the upper end, and both ends of the handrail rod 14B are fixed to the inner sides of the connecting bodies 14A5 in the direction of the horizontal rod 11b of the gate frames 11A and 11B. The handrail rod 1 is similar to the middle part of the handrail post 14A.
Fix with 4B. Connecting pipe 13 of the tenon tube 13b each gate shape frame 11A, fitted into the hole of the upper end of the pedestal 11a of 11B, pinning the through hole 11A ₁ of the upper end of the through-holes 13b ₁ and the pedestal 11a of the tenon tube 13b 18 is fitted and the connecting pipe 13 is fixed to the upper end of the column base 11a so that the notch 13d of each connecting pipe 13 faces the right side in FIG. And the connecting body 1 of the handrail post 14A
4A5 is attached to the upper end of the gate frames 11A and 11B so that both ends of the handrail rod 14C in a direction perpendicular to the horizontal rod 11b can be rotated, and the same handrail rod 14C is attached to the middle part of the handrail post 14A. Install so that both ends can be rotated. Next, how to use the work scaffold 10 will be described. When the handrail frame 14 in the standing posture shown by the solid line in FIG. 1 is folded and folded, for example, an operator rides on the work floor 12, holds the handrail rods 14C on both sides with both hands, and then the coil springs 15 each.
Lift the handrail frame 14 against the
When the handrail rod 14C is pushed to the right in FIG. 1 by bringing the lower end of the handrail into contact with the pivot shaft 17 so that the handrail post 14A can be raised and lowered, the handrail post 14A rotates around the pivot shaft 17 as a center. It moves, falls to the position shown by the chain double-dashed line, and is folded. When the handrail frame 14 in the folded state is placed in the upright posture, hold the handrail rod 14C of the folded and folded handrail frame 14 and push it to the left in FIG. Thereby, the upper end of the long groove 14A1 of each handrail post 14A comes into contact with the pivot 17, and the handrail post 14A automatically moves to its upright posture. The second embodiment of the present invention is shown in FIG. 6 and is an example in which the handrail frame 14 is separated into two, and the two separated handrail frames are stacked on the work floor 12 and folded. The difference from the first embodiment is that the handrail rod 14C is attached to the handrail post 14A so that the handrail rod 14C can be removed, and each connecting pipe 1
The connecting pipes 13 are attached to the handrail posts 14A so that the three notches 13d face in a direction perpendicular to the horizontal rods 11b and face each other, and the handrail rods 14C are removed to separate the handrail posts 14A. Is laid down on the work floor 12 so that the handrail frames can be overlapped and folded. The alternate long and two short dashes line in Fig. 6 shows the state in which the separated handrail frames 14 'and 14 "are folded. In the first and second examples, the scaffold frame body 11 is connected to the pedestal 11a. The pipe 13 is detachably connected, and the lower end of the handrail post 14A of the handrail frame 14 is attached to the connecting pipe 13.
May be fixed to the upper end of the pedestal 11a by welding or the like, or the pedestal may be configured by a tube body longer than the pedestal 11a by the length of the mounting portion of the handrail post 14A (the length of the connecting pipe 13). May be.

[Effect of device]

This device has the following effects (a) to (d) by having the structure described in the utility model registration claim. (A) In the mobile work platform according to claim 1, when the handrail rod of the handrail frame is held and each handrail column is moved upward against the spring, the handrail column can be raised and lowered. When the handrail rod is pushed in the horizontal direction in the state, the handrail post of the handrail frame can be easily folded down and folded, and the handrail rod of the handrail frame in the folded state can be held in the opposite horizontal direction. When you push to raise the handrail frame, the lower part of the handrail column moves downward by the spring and engages with the regulation member, and the handrail frame is kept in the upright posture, so the operation of raising and folding the handrail frame is very easy. Is. And since the operation of standing and folding the handrail frame becomes easy, it is possible to completely prevent work with the handrail frame tilted or with the handrail frame removed, and on a mobile work platform. The safety of the work to be performed is improved. Like the conventional one, the sheath pipe fitted to each handrail pillar is moved up and down one by one,
It is not necessary to add a means for actively maintaining the standing posture and the folded state. (B) As described in claim 2, a vertical long groove is provided in the lower part of the handrail pillar, a pivot is provided in the upper part of the pedestal, and the pivot shaft is fitted in the long groove, and the handrail pillar is provided downward. An urging spring is provided so that the handrail post is maintained in an upright posture when the pivot shaft is engaged with the upper portion of the long groove, and the handrail post is raised and lowered when the pivot shaft is engaged with the lower portion of the long groove. When the handrail frame is configured to be obtained, the structure of the mechanism for standing or folding the handrail frame becomes simple and can be provided at low cost. (C) As described in claim 3, the connecting pipe is detachably attached to the upper part of the pedestal of the scaffolding frame, and the vertical groove is provided in the handrail column of the pipe body, and the connecting pipe is cut at the upper part of the connecting pipe. A notch and a pivot are provided, and the pivot is fitted in the long groove so that the lower part of the handrail column of the pipe body can be fitted into the connecting pipe, and the locking pin is provided above the long groove of the handrail column of the pipe body. And a spring for urging the handrail post downwards is interposed between the locking pin and the pivot, and the lower end of the handrail post when the pivot of the connecting pipe is engaged with the upper end of the long groove of the handrail post Is located below the notch of the connecting pipe so as to maintain the standing posture of the handrail post, and when the pivot of the connecting pipe is engaged with the lower end of the long groove of the handrail post The lower end of the is located in the notched part of the connecting pipe,
When the handrail pillars are connected so that they can be tilted to the notched side of the pipe, the folding handrail frame can be easily attached to the movable work platform consisting of the existing gate frame, and the handrail frame is erected. Alternatively, the structure of the mechanism for folding becomes simpler. (D) If the spring for urging the handrail pillar downward is provided in the handrail pillar as described in claim 4, the spring is hidden and does not interfere with the work.

[Brief description of drawings]

1 to 5 show a mobile work platform according to the first embodiment. FIG. 1 is a front view of the work platform, and FIG.
FIG. 3 is a side view of what is shown in the figure, FIG. 3 is a front view showing a part of a connecting portion between the upper part of the pedestal and the lower part of the handrail column in section, and FIG. 4 is a main part of FIG. FIG. 5 is a side view showing a part of a connecting portion between the upper part of the pedestal and the lower part of the handrail pillar, and FIG. 6 is a main view of the work scaffold of the second embodiment. FIGS. 7 to 9 show a conventional work scaffold, FIG. 7 is a perspective view of the work scaffold, and FIG. 8 is a perspective view of the work scaffold showing a state in which the sheath tube is lowered. FIG. 9 is a front view of the part, and FIG. 9 is a side view of the main part of the work scaffold showing a state in which the sheath tube is raised. 10 …… Work scaffolding, 11 …… Scaffolding frame body, 11A, 11B …… Gate frame 11a …… Leg rod, 11b …… Horizontal rod, 12 …… Working floor 13 …… Connecting pipe, 13b …… Mortar pipe, 13b ₁ ...... through hole 13d ...... notch, 13e ...... through hole, 14 ...... handrail frame 14A ...... handrail post, 14A1 ...... long groove, 14A2 ...... through hole 14A4 ...... lid body, 14A5 ...... connected body , 14B, 14C ...... Handrail rod 15 ...... Coil spring, 15a ₁ ...... Locking ring part, 15b ₁ ......
Locking ring at the bottom 16 …… Locking pin, 17 …… Axis, 18 …… Stopping pin

Claims (4)

[Scope of utility model registration request] 1. A mobile work scaffold in which a work floor is attached to a scaffold frame, a handrail post of a handrail frame is attached above a pedestal of the scaffold frame, and the handrail frame is foldable. Attach the lower part of the handrail pillar to the upper part of the pedestal so that it can move in the vertical direction, and provide a spring to urge the handrail pillar downward.When the lower part of the handrail pillar is in the lower position, It is configured such that the standing posture is maintained by engaging with the upper train member, and when the lower part of the handrail column is in the upper position, the lower part of the handrail column is disengaged from the train member and the handrail column can be erected. A mobile work scaffold characterized by 2. A mobile work scaffold in which a work floor is attached to a scaffold frame, a handrail post of a handrail frame is attached above a pedestal of the scaffold frame, and the handrail frame is foldable. A vertical groove is provided in the lower part of the handrail post, a pivot is provided in the upper part of the pedestal, a spring for fitting the pivot shaft in the long groove and urging the handrail downward is provided, and the pivot is the upper part of the long groove. The upright posture of the handrail pillar is maintained when the handrail pillar is engaged with, and the handrail pillar can be tilted when the pivot is engaged with the lower portion of the long groove. Mobile work scaffolding. 3. A mobile work scaffold in which a work floor is attached to a scaffold frame, a handrail post of a handrail frame is attached above a pedestal of the scaffold frame, and the handrail frame is foldable. The connecting pipe is removably attached to the upper part of the pillar of the scaffolding frame, the vertical groove is provided in the handrail column of the pipe body, the notch and the pivot are provided in the upper part of the connecting pipe, and the pivot is provided in the long groove. By fitting so that the lower part of the handrail pillar of the pipe body can be fitted to the connecting pipe, a locking pin is provided above the long groove of the handrail pillar of the pipe body,
A spring for urging the handrail post downward is interposed between the locking pin and the pivot, and when the pivot of the connecting pipe is engaged with the upper end of the long groove of the handrail post, the lower end of the handrail post is connected. It is located below the notch of the handrail so that the handrail post maintains its upright posture, and when the lower end of the long groove of the handrail post is engaged with the pivot of the connecting pipe, the bottom end of the handrail post is A mobile work scaffold characterized in that it is located in a notched portion of the connecting pipe and is configured so that the handrail pillar can be brought down to the notched side of the connecting pipe. 4. The movable work scaffold according to claim 1, 2 or 3, wherein a spring for urging the handrail pillar downward is provided in the handrail pillar.